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81.
A. A. Pasynskii Yu. V. Torubaev F. S. Denisov A. N. Grechkin K. A. Lyssenko S. E. Nefedov V. M. Novotortsev Zh. V. Dobrokhotova 《Russian Chemical Bulletin》1999,48(9):1744-1750
Complexes [RC5H4Fe(CO)2]2Sn(TePh)2 (R=H, Me) containing stable heterometallic Fe−Sn−Fe fragments with two phenyltellurium groups at the tin atom were synthesized
from [RC5H4Fe(CO)2]2SnCl2 (R=H, Me) and sodium phenyltelluride and their structures were established by X-ray analysis. Their chelates with tungsten
tetracarbonyl, [RC5H4Fe(CO)2]2Sn(TePh)2[W(CO)4] (R=Me, H), and complexes with two Cr(CO)5 fragments or dimeric trimethylplatinum iodide were synthesized and studied by X-ray analysis. Thermal decomposition of [RC5H4Fe(CO)2]2Sn(TePh)2 complexes and their adducts with ML fragments (ML=W(CO)4, 2 Cr(CO)5, (Me3PtI)2) into inorganic tellurides of a preset mixed-metal—chalcogenide composition was studied by differential scanning calorimetry.
The temperature of complete elimination of organic fragments from methylcyclopentadienyl complexes is about 100°C lower than
in the case of cyclopentadienyl analogs.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1766–1772, September, 1999. 相似文献
82.
83.
84.
V.T. Kalinnikov A.A. Pasynskii G.M. Larin V.M. Novotortsev Yu.T. Struchkov A.I. Gusev N.I. Kirillova 《Journal of organometallic chemistry》1974,74(1):91-96
The trinuclear complex [C5H5NbOOCH]3 (OH)2 (O)2 was prepared by heating C5H5Nb(CO)3PPh3 with anhydrous HCOOH in xylene. The niobium atoms are located at the vertices of an almost regular triangle with short Nb?Nb distance equal to 3.14». The electronic configuration of niobium is d1. Analysis of the magnetic properties and location of the niobium atoms indicated that they bind only by the formate, hydroxylic and oxygen bridges instead of by direct NbNb bonds. 相似文献
85.
Pasynskii A. A. Semenova N. I. Torubaev Yu. V. Belousov P. V. Galustyan A. R. Lyssenko K. A. 《Russian Chemical Bulletin》2003,52(4):944-951
The reactions of Fe2Se2(CO)6 (1b) with Ru(CO)4(C2H4), Mn2(CO)10, or Np"Re(CO)2THF gave the known cluster Fe2RuSe2(CO)9 (4b) and new clusters (CO)6Fe2Se2Mn2(CO)8 (5) and Cp"Re(CO)2Se2Fe2(CO)6 (6). By successive reactions of Mo(CO)5THF with 1b and Fe2Te2(CO)6, the new heterometallic heterochalcogenide cluster Fe2(CO)6(3-Se)2Mo(CO)2(3-Te)2Fe2(CO)6 (8) was synthesized. The structures of 4b, 5, and 6 were determined by X-ray diffraction analysis. 相似文献
86.
A.A. Pasynskii I.L. Eremenko G.Sh. Gasanov O.G. Ellert V.M. Novotortsev Yu.V. Rakitin T.Kh. Kurbanov V.T. Kalinnikov Yu.T. Struchkov V.E. Shklover 《Polyhedron》1984,3(7):775-780
Reactions of (RC5H4)2Cr2(SCMe3)2S(I, R = H; II, R = Me) with (PPh3)2PdCl2 in benzene at 20°C gives trinuclear complexes (RC5H4)2Cr2Cl2(μ3-S)(μ-SCMe3)2Pd(PPh3)(III, R = H; IV, R = Me). The structure of IV as a monobenzene solvate is established by an X-ray analysis (black-green triclinic crystals space group P with a = 11.403(4), b = 14.933(5), c = 14.131(5) Å, α = 99.13(3), β = 112.72(3), γ = 95.65(3)°, V = 2201.6 Å, Z = 2; IV·C6H6). The structure was solved by direct methods and refined in an anisotropic approximation to R = 0.046, Rw = 0.058 for 7643 reflections with I ? 2σ(I). In the molecule of IV metal atoms are separated by non-bonding distances (Cr … Cr 4.079(I), Cr … Pd 3.230(I) and 3.380(I) Å) but linked by the bridging tridentate sulphur atom (CrS 2.339(2) and 2.329(2), PdS 2.327(2) Å), and two SCMe3 groups between Pd and Cr (CrS 2.396(2) and 2.403(2), PdS 2.350(2) and 2.381(2) Å, Cr?Pd 85.14(6) and 89.92(6)°). The Cl atoms are transferred from Pd to Cr atoms (CrCl 2.308(2) Å) and being terminally coordinated are in trans-positions to each other (as well as η-CH3C5H4 rings) with respect to the Cr2Pd plane. Cr atoms in III and IV exhibit ferromagnetic exchange interactions over the Cr?Cr system (+2J = 28 and 11 cm?1, respectively). 相似文献
87.
88.
The formation of transition metal complexes with pivalate and cymantrenecarboxylate ligands in the presence of axial cyclopentadienyl and α-substituted pyridine ligands is discussed. The latter present steric hindrances due to repulsion from the O atoms of the carboxylate bridges. Particular emphasis is placed on the role of outer-sphere ammonium cations: their hydrogen bonding to fluoride bridges limits the growth of cyclic chromium(III) complexes with the pivalate and fluoride ligands that possess the properties of molecular magnets. 相似文献
89.
90.
A. A. Pasynskii I. L. Eremenko B. Orazsakhatov Yu. V. Rakitin V. M. Novotortsev O. G. Ellert V. T. Kalinnikov 《Journal of organometallic chemistry》1981,210(3)
The photochemical reaction between the antiferromagnetic complex (C5H5-CrSCMe3)2S (I) (containing a Cr---Cr bond 2.689 Å long) and Fe(CO)5 results in the elimination of two carbonyl groups and one tert-butyl radical to give (C5H5Cr)2(μ2-SCMe3)(μ3-S)2 · Fe(CO)3 (III). As determined by X-ray diffraction, III contains a Cr---Cr bond of almost the same length as in I (2.707 Å), together with one thiolate and two sulphide bridges. The latter are also linked with the Fe atom of the Fe(CO)3 moiety (average Fe---S bond length 2.300 Å). Fe also forms a direct bond, 2.726 Å long, with one of the Cr atoms, whereas its distance from the other Cr atom (3.110 Å) is characteristic for non-bonded interactions. Complex III is antiferromagnetic, the exchange parameter, −2J, values for Cr---Cr, Cr(1)---Fe and Cr(2)…Fe are 380, 2600 and 170 cm−1, respectively. The magnetic properties of III are discussed in terms of the “exchange channel model”. The contributions from indirect interactions through bridging ligands are shown to be insignificant compared with direct exchange involving metal---metal bonds. The effects of steric factors and of the nature of the M(CO)n fragments on the chemical transformations of (C5H5CrSCMe3)2S · M(CO)n are discussed. 相似文献